linux-kernel - Re: [PATCH] Fix blkdev.h build errors when BLOCK=n

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Message-ID: <4FB0A668.40501@kernel.dk>
Date:	Mon, 14 May 2012 08:30:00 +0200
From:	Jens Axboe <axboe@...nel.dk>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
CC:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] Fix blkdev.h build errors when BLOCK=n

On 04/30/2012 10:18 AM, Russell King - ARM Linux wrote:
> I see builds failing with:
> 
>   CC [M]  drivers/mmc/host/dw_mmc.o
> In file included from drivers/mmc/host/dw_mmc.c:15:
> include/linux/blkdev.h:1404: warning: 'struct task_struct' declared inside parameter list
> include/linux/blkdev.h:1404: warning: its scope is only this definition or declaration, which is probably not what you want
> include/linux/blkdev.h:1408: warning: 'struct task_struct' declared inside parameter list
> include/linux/blkdev.h:1413: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'blk_needs_flush_plug'
> make[4]: *** [drivers/mmc/host/dw_mmc.o] Error 1
> 
> This is because dw_mmc.c includes linux/blkdev.h as the very first file,
> and when CONFIG_BLOCK=n, blkdev.h omits all includes.
> 
> As it requires linux/sched.h even when CONFIG_BLOCK=n, move this out of
> the #ifdef.

Thanks Russell, applied.

-- 
Jens Axboe

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